The average of ten numbers is 42. The average of the first four numbers is 38, while the average of the last three numbers is 48. What is the average of the remaining three numbers?
Show answer & explanation
Correct answer: A
Explanation
Total sum of 10 numbers = 10 × 42 = 420
Sum of the first 4 numbers = 4 × 38 = 152
Sum of the last 3 numbers = 3 × 48 = 144
Sum of the remaining 3 numbers = 420 − 152 − 144 = 124
Average of the remaining 3 numbers = 124/3= 41.33